I'm noticing that performance with SunBlogNuke is not very good in DNN9. I was first noticing that the blog page is sluggish to load (3-4 seconds per refresh). I checked other pages and they were speedy, loading in milliseconds, even my forums software. I looked at the server and I noticed that for each click, w3wp.exe was using 25% total CPU (100% on one core). I ran a simple load testing where I had 10 simultaneous requests clicking on a new blog page every 5 seconds and it absolutely brought my entire site to a crawl and pegged the CPU. I ran the same test in forums and other pages and it was fine. So it seems some SBN module is causing slow performance. I found I could mitigate the problem by turning on DNN page caching, but that only helps temporarily because once the cache expires, it's another very slow load. Also it prevents timely refresh of content since it will used a cached page until cache expiration.